Electronically Regulated Speed Change Unit for Turntables

The Pro-Ject Speed Box II is a very useful accessory for Pro-Ject turntables that do not have built-in electronic speed change.* The Speed Box II performs this change by the push of a button between 33 and 45 rpm. The quartz regulation and filter circuit gives a stable speed reference. The small size of the Speed Box II allows placement close to your turntable.

Good Sound from Sound Technology

Pro-Ject Speed Box II uses a quartz-generated high precision electronic speed regulation. The output power consists of a clean quartz clock-generated sine wave voltage decoupled from the AC interference. A metal case shields the electronics from vibration and electromagnetic interference.

All functions are microprocessor controlled. An outboard power supply is included.